Biological Molecules 2

Please use your notes and books to answer all the questions.
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1: What is this molecule?: Glucose
Maltose
Pentose
Triose
An amino acid
Fructose
2: Water molecules have two charged ends. Molecules can form a weak type of bond between each other. What are these bonds?: Ionic
Covalent
Hydrogen
Hydrophillic
Hydrocopic metallic bonds
3: Use one word to name the molecule below:
4: How many amino acids occur naturally in the proteins of living organisms?: 10
96
46
12
50
20
5: Which word describes a fat that has more than one double bond between neighbouring carbon atoms?
6: Region a) of the image above is best described as: Hydrophobic
Hydroscopic
A fatty acid
A non-polar head
Hydrophilic
7: Work out the molecular formula of the following molecule:: C₁₂H₂₂O₁₂
C₁₂H₂₁O₁₁
C₁₂H₂₂O₁₁
C₁₂H₂₃O₁₁
C₁₂H₂₁O₁₂
C₁₃H₂₂O₁₁
8: Examine the diagram below: What s it?: An amimo acid
A simple sugar
Glucose
A phospholipid
A lipid
A monosacharide
9: Which is the carboxyl group?: a)
b)
c)
d)
10: Polymerisation of the molecule in question 8 produces: Polysacharides
Starch
Cellulose
Protein
Long chain fats
11: Starch is made from Amylopectin and ____________: Glucose
Lactose
Amylose
Maltose
Glycogen
Fructose
12: Here is an image of a haemoglobin molecule. What type of protein is it?: A fibrous protein
A globular protein
A branched chain protein
A pleated sheet protein
An alpha helix
A structural protein
13: The image below is a section of what ?: Cellulose
Glycogen
Polypeptide
Starch
Protein
14: The subunits of polypeptides are: Simple sugars
Fatty acids and glycerol
Monosacharides
Amino acids
Pentose sugars
Glucose
15: What word is used to refer to an atom that has gained or lost one or more electrons and therefore have a charge?
16: The diagram below shows the unequal distribution of charge that occurs on water molecules. Please type the name for such unequal distribution of charge.
17:

What colour does biuret reagent go in the presence of protein?: Red
Yellow
Purple
Green
Orange
Brown
18: Examine the image below. What is it?: An amino acid
A disacharide
A monosacharide
A dipeptide
Maltose
A simple sugar
19: With referebce to the diagram in question 18, what is the arrow pointing to?: A hydrogen bond
A glycosidic bond
Cross links
An ionic bond
A peptide bond
20: Monosacharides, disacharides and polysacharides are all examples of: Polypeptides
Polynucleotides
Long chain fatty acids
Carbohydrates
Polyphenols
21: Which of the following has the molecular formula C₆H₁₂O₆: A certain disacharide
A certain monosacharide
Maltose
Sucrose
Lactose
A nucleotide
22: What molecule is this most likely to be?: A polysacharide
A polypeptide
Starch
Glycogen
23: Two forms of the same chemical are known as: Monomers
Polymers
Synonymers
Isomers
Glycomers
24: What term is used to describe the way in which a protein coils up to form a precise 3-D shape?: Primary structure
Secondary structure
Tertiary structure
Quaternary structure
25: Benedicts reagent tests for the presence of: Reducing sugars
Non-reducing sugars
All sugars
All polysacharides
Starch
26: Complete this sentence: A ____________ sugar has three carbon atoms in its molecule.
27: What is occurring in the following diagram?: Hydrolysis
Glycolysis
Condensation
Reduction
Carboxylation
28: What reagent is used in the test for the presence of lipids?: Biuret reagent
Benedict's solution
Iodine
Ethanol
Universal indicator
29: In the polymerisation of a polysacharide, each of the monsacharide subunits are joined by a: Hydrogen bond
Covalent bond
Glycosidic bond
Ionic bond
Peptide bond
30: What is the following molecule?: Tryglyceride
Branched chain carboohydrate
Polypeptide
Starch
Glycogen
Deoxy Ribonucleic Acid